TWM623191U - Lamp assembly and its polarity switching unit - Google Patents

Abstract

This creation provides a polarity switching unit, which is used for electrically connecting lamps. The polarity switching unit includes a control element and a polarity switching circuit. The control element is used for outputting the control signal at the switching frequency. The polarity switching circuit is electrically connected to the control element, and the polarity switching circuit includes a first output terminal and a second output terminal electrically connected to the lamp, wherein the first output terminal corresponds to the first polarity, and the second output terminal corresponds to the second polarity. The polarity switching circuit receives the control signal to alternately switch the first polarity of the first output terminal and the second polarity of the second output terminal, and the switching frequency is defined as when the lamp is emitting light, it is impossible to detect the flashing of the lamp due to the alternating polarity switching. frequency.

Description

Luminaire assembly and its polarity switching unit

This creation relates to a lamp assembly and its polarity switching unit, especially a lamp assembly and its polarity switching unit that can quickly switch the output polarity of a power supply.

A light fixture assembly typically includes a light fixture (eg, a light bulb, tube, or other light source) and controls. When the control device is combined with the lamp, the control device can provide the electric power required for the lighting of the lamp on the one hand, and control the lighting time or/and the lighting mode of the lamp on the other hand.

When assembling some lighting components, it is necessary to combine the control device and the lighting with the same polarity to complete the electrical connection between the control device and the lighting, so that the power obtained by the control device can be supplied to the lighting smoothly. If the control device and the lamps are combined with different polarities, the light ones cannot make the lamps light up smoothly, and the serious ones may cause the control device or/and the lamps to be damaged or even burnt. Although some manufacturers set up a foolproof structure at the junction of the control device and the lamp to avoid user assembly errors, the aforementioned problems may still occur in the assembly if the user is negligent or if the manufacturer does not provide any such foolproof structure as described above. , thereby causing danger and distress to the user.

Therefore, how to design a lamp assembly and its polarity switching unit that can solve the aforementioned problems without worrying about the wrong combination of polarities is a topic worthy of research.

The purpose of this creation is to provide a polarity switching unit that can quickly switch the output polarity of a power supply.

Another object of the present invention is to provide a lamp assembly using the aforementioned polarity switching unit.

To achieve the above purpose, the polarity switching unit of the present invention includes a control element and a polarity switching circuit. The control element is used for outputting the control signal at the switching frequency. The polarity switching circuit is electrically connected to the control element, and the polarity switching circuit includes a first output terminal and a second output terminal electrically connected to the lamp, wherein the first output terminal corresponds to the first polarity, and the second output terminal corresponds to the second polarity. The polarity switching circuit receives the control signal to alternately switch the first polarity of the first output terminal and the second polarity of the second output terminal, and the switching frequency is defined as when the lamp is emitting light, it is impossible to detect the flashing of the lamp due to the alternating polarity switching. frequency.

In an embodiment of the present invention, the control element is electrically connected to the polarity switching circuit with the first line and the second line, and the control signal output by the control element is alternately output to the first line and the second line at the switching frequency.

In an embodiment of the present invention, the first polarity is different from the second polarity at the same time point.

In an embodiment of the present invention, the polarity switching circuit further includes a plurality of electronic switching elements, and the plurality of electronic switching elements respectively perform open-circuit or closed-circuit switching according to the control signal, so that the first polarity of the first output end and the second polarity of the second output end The polarities are switched alternately.

In an embodiment of the present invention, the plurality of electronic switching elements include a first transistor, a second transistor, a third transistor, and a fourth transistor, and the first transistor is located between the ground and the second transistor. Between the output terminals, the second transistor is between the ground terminal and the first output terminal, the third transistor is between the power supply terminal, the first output terminal and the second output terminal, and the fourth transistor between the power supply terminal, the first output terminal and the second output terminal.

In an embodiment of the present invention, the emitter of the first transistor is connected to the ground terminal, the base of the first transistor is connected to the first circuit, and the collector of the first transistor is connected to the second output terminal and the third The collector of the triode; the emitter of the second triode is connected to the ground terminal, the base of the second triode is connected to the second circuit, and the collector of the second triode is connected to the first output terminal and the fourth triode The collector of the tube; the emitter of the third transistor is connected to the power supply terminal, the base of the third transistor is connected to the first output terminal, and the collector of the third transistor is connected to the second output terminal and the first transistor The emitter of the fourth transistor is connected to the power supply terminal, the base of the fourth transistor is connected to the second output terminal, and the collector of the fourth transistor is connected to the first output terminal and the second transistor. Collector.

In an embodiment of the present invention, the polarity switching circuit further includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor. The two ends of the first resistor are respectively connected to the base of the first transistor and the first line, the two ends of the second resistor are respectively connected to the base of the second transistor and the second line, and the two ends of the third resistor are respectively connected The emitter and base of the third triode, the two ends of the fourth resistor are respectively connected to the base and the first output end of the third triode, and the two ends of the fifth resistor are respectively connected to the emitter of the fourth triode and the base, and the two ends of the sixth resistor are respectively connected to the base and the second output terminal of the fourth transistor.

The lighting components of this creation include lighting and a control device that is electrically connected to the lighting. The control device includes the polarity switching unit and the electrical connection part as described above. The electrical connection part is electrically connected to the polarity switching unit, and the electrical connection part integrates the first output terminal and the second output terminal of the polarity switching unit. When the lamp emits light, the polarity switching unit alternately switches the first polarity of the first output terminal and the second polarity of the second output terminal at the switching frequency, and at this time, it is impossible to detect the lamp flickering due to the alternating polarity switching.

In an embodiment of the present invention, the electrical connection portion includes a foolproof structure to prevent improper connection between the lamp and the electrical connection portion.

In an embodiment of the present invention, the light fixture is a single or a plurality of light bulbs, light tubes, light bars or light boxes.

Since the various aspects and embodiments are only illustrative and non-limiting, after reading this specification, those with ordinary knowledge will know that there may be other aspects and embodiments without departing from the scope of the present invention. The features and advantages of these embodiments will become more apparent from the following detailed description and claims.

As used herein, the use of "a" or "an" is used to describe elements and components described herein. This is only for the convenience of explanation and to provide a general meaning to the scope of this creation. Accordingly, unless it is clear that it is meant otherwise, such descriptions should be read to include one or at least one, and the singular also includes the plural.

Furthermore, as used herein, the terms "includes," "has," or any other similar term are intended to encompass non-exclusive inclusions. For example, an element or structure containing a plurality of elements is not limited to only those elements listed herein, but may include other elements not expressly listed, but which are generally inherent to the element or structure.

In this document, the terms "first" or "second" and similar ordinal numbers are mainly used to distinguish or refer to the same or similar elements or structures, and do not necessarily imply that such elements or structures are spatially or temporally distinct. order. It should be understood that in certain situations or configurations, ordinal numbers may be used interchangeably without affecting the implementation of the present invention.

In this paper, the term "transistor" is mainly defined as a semiconductor device having three terminals and can be used as an amplifier or a switch, which may also be called "triode", "transistor", "transistor" and the like.

Please refer to FIG. 1 for a schematic diagram of the polarity switching unit of the present invention. As shown in FIG. 1 , the polarity switching unit 1 of the present invention is mainly electrically connected to a lamp 110 , and the lamp 110 can be composed of a single or a plurality of light bulbs, light tubes, light bars or light boxes.

The polarity switching unit 1 of the present invention includes a control element 10 and a polarity switching circuit 20 , and the polarity switching circuit 20 is electrically connected to the control element 10 . The control element 10 is used for outputting a control signal at a switching frequency to control the polarity switching circuit 20 to perform polarity switching for each output terminal. Here, the control element 10 can be a control IC, and the control signal includes a control voltage that can drive the polarity switching circuit 20 to perform corresponding operations, and the control IC can control the output time and voltage of the control signal, but the present invention is not limited. The control IC outputs a control signal to the polarity switching circuit 20, and the control signal can be outputted by the control IC according to a set switching frequency. The definition of the switching frequency will be further explained in the following content.

In an embodiment of the present invention, the control element 10 is electrically connected to the polarity switching circuit 20 through the first line 11 and the second line 12 , and the control element 10 is alternately connected through the first line 11 and the second line 12 The control signal is output to the polarity switching circuit 20 . For example, the control element 10 can first output the control signal through the first line 11, then alternately output the control signal through the second line 12, and then output the control signal through the first line 11 again..., and this cycle is repeated. operate.

The polarity switching circuit 20 can be disposed on the circuit board, and the polarity switching circuit 20 receives the control signal from the control element 10 through the first circuit 11 and the second circuit 12 . The polarity switching circuit 20 includes a power terminal V, a ground terminal G, a first output terminal 21 and a second output terminal 22 . The power terminal V is used for connecting the voltage source, and the ground terminal G is used for grounding. The first output terminal 21 and the second output terminal 22 are used to electrically connect the lamp 110 to supply power to the lamp 110 , wherein the first output terminal 21 corresponds to the first polarity, and the second output terminal 22 corresponds to the second polarity. Here the first polarity or the second polarity can be positive or negative. In an embodiment of the present invention, at the same time point, the first polarity of the first output terminal 21 is different from the second polarity of the second output terminal 22 . That is to say, at the same time point, if the first polarity of the first output terminal 21 is positive, the second polarity of the second output terminal 22 is negative; otherwise, if the first polarity of the first output terminal 21 is negative, Then the second polarity of the second output terminal 22 is positive.

The control signal output by the aforementioned control element 10 is alternately output to the first line 10 and the second line 20 at the set switching frequency, and the polarity switching circuit 20 will alternately switch the first output terminal according to the received control signal The first polarity of 21 and the second polarity of the second output terminal 22 . The switching frequency here can be defined as when the lamp 110 emits light by being connected to the first output terminal 21 and the second output terminal 22 of the polarity switching circuit 20 , ordinary people cannot perceive the lamp 110 due to the alternating switching of the polarity of the polarity switching circuit 20 to the naked eye. The frequency of flickering.

In an embodiment of the present invention, the polarity switching circuit 20 further includes a plurality of electronic switching elements 23, and the plurality of electronic switching elements 23 respectively perform open-circuit or closed-circuit switching according to the control signal, so that the first polarity and the second output of the first output terminal 21 are The second polarity of terminal 22 is alternately switched. The electronic switching element here can be a triode (transistor), an electronic switch or other elements with switching control function.

Please refer to FIG. 2 for a schematic diagram of the polarity switching circuit of the polarity switching unit of the present invention. As shown in FIGS. 1 and 2 , in an embodiment of the present invention, the plurality of electronic switching elements 23 of the polarity switching circuit 20 include a first transistor Q1 , a second transistor Q2 , a third transistor Q3 and The fourth transistor Q4. The first transistor Q1 is located between the ground terminal G and the second output terminal 22, the second transistor Q2 is located between the ground terminal G and the first output terminal 21, and the third transistor Q3 is located between the power terminal V, the first output terminal 21 and the second output terminal 22 , and the fourth transistor Q4 is located between the power terminal V, the first output terminal 21 and the second output terminal 22 .

Embodiments of the polarity switching circuit 20 of the polarity switching unit 1 of the present invention are further described below. In this embodiment, the first transistor Q1 is an NPN transistor, the second transistor Q2 is an NPN transistor, the third transistor Q3 is a PNP transistor, and the fourth transistor Q4 is a PNP transistor. The emitter E1 of the first transistor Q1 is connected to the ground terminal G, the base B1 of the first transistor Q1 is connected to the first line 11 , and the collector C1 of the first transistor Q1 is connected to the second output terminal 22 and the collector C3 of the third transistor Q3; the emitter E2 of the second transistor Q2 is connected to the ground terminal G, the base B2 of the second transistor Q2 is connected to the second line 12, and the second transistor Q2 The collector C2 is connected to the first output terminal 21 and the collector C4 of the fourth transistor Q4; the emitter E3 of the third transistor Q3 is connected to the power supply terminal V, and the base B3 of the third transistor Q3 is connected to the first The output terminal 21, and the collector C3 of the third transistor Q3 is connected to the second output terminal 22 and the collector C1 of the first transistor Q1; the emitter E4 of the fourth transistor Q4 is connected to the power supply terminal V, and the fourth transistor Q4 is connected to the power supply terminal V. The base B2 of the transistor Q4 is connected to the second output terminal 22, and the collector C4 of the fourth transistor Q4 is connected to the first output terminal 21 and the collector C2 of the second transistor Q2.

In addition, in this embodiment, the polarity switching circuit 20 further includes a first resistor R1 , a second resistor R2 , a third resistor R3 , a fourth resistor R4 , a fifth resistor R5 and a sixth resistor R6 . Two ends of the first resistor R1 are respectively connected to the base B1 of the first transistor Q1 and the first line 11, and two ends of the second resistor R2 are respectively connected to the base B2 of the second transistor Q2 and the second line 12, Two ends of the third resistor R3 are respectively connected to the emitter E3 and the base B3 of the third transistor Q3, and two ends of the fourth resistor R4 are respectively connected to the base B3 of the third transistor Q3 and the first output end 21, Two ends of the fifth resistor R5 are respectively connected to the emitter E4 and the base B4 of the fourth transistor Q4, and two ends of the sixth resistor R6 are respectively connected to the base B4 of the fourth transistor Q4 and the second output terminal 22 .

The operation principle of the polarity switching unit 1 of the present invention will be described below by using the foregoing embodiments of the polarity switching circuit 20 . Please refer to FIG. 3 and FIG. 4 together, wherein FIG. 3 is a schematic diagram of the polarity switching circuit of the polarity switching unit of the invention when the control signal is only received through the first line, and FIG. 4 is the polarity switching circuit of the polarity switching unit of the invention. The schematic diagram when the control signal is received only through the second line. As shown in FIGS. 1 and 3 , it is assumed that the control element 10 alternately outputs a control signal (eg, a control voltage) to the first line 11 and the second line 12 at a set switching frequency. When the control signal is only transmitted to the polarity switching circuit 20 through the first line 11 , the base B1 of the first transistor Q1 will generate a current, so that the first transistor Q1 is closed and the first transistor Q1 is turned on. The collector C1 and the emitter E1 of the transistor Q1. Since the collector C1 of the first transistor Q1 and the base B2 of the fourth transistor Q4 are both connected to the second output terminal 22, the base B2 of the fourth transistor Q4 will also generate current, so that the fourth transistor Q4 also generates current. The transistor Q4 is in a closed state, thereby conducting the collector C4 and the emitter E4 of the fourth transistor Q4. Accordingly, the current can flow from the power supply terminal V to the ground terminal through the fourth transistor Q4 and the first transistor Q1, so that the second polarity of the second output terminal 22 is positive.

Since the control element 10 does not output the control signal to the polarity switching circuit 20 through the second circuit 12 at this time, the base B2 of the second transistor Q2 does not generate current, so that the second transistor Q2 is in an open state (open state). ) without conducting the collector C2 and the emitter E2 of the second transistor Q2. Since the collector C2 of the second transistor Q2 and the base B3 of the third transistor Q3 are both connected to the first output terminal 21, the base B3 of the third transistor Q3 will not generate current, so that the first The transistor Q3 is in an on state without conducting the collector C3 and the emitter E3 of the third transistor Q3. Accordingly, the first polarity of the first output terminal 21 is negative.

1 and 4, when the control element 10 alternately controls the output of the signal, so that the control signal is only transmitted to the polarity switching circuit 20 through the second line 12, the base B2 of the second transistor Q2 will generate The current causes the second transistor Q2 to be in a closed state, thereby conducting the collector C2 and the emitter E2 of the second transistor Q2. Since the collector C2 of the second transistor Q2 and the base B3 of the third transistor Q3 are both connected to the first output terminal 21, the base B3 of the third transistor Q3 also generates current, which causes the third transistor Q3 to generate current. The transistor Q3 is in a closed state, thereby conducting the collector C3 and the emitter E3 of the third transistor Q3. Accordingly, the current can flow from the power supply terminal V to the ground terminal through the third transistor Q3 and the second transistor Q2, so that the first polarity of the first output terminal 21 is positive.

Since the control element 10 does not output the control signal to the polarity switching circuit 20 through the first circuit 11 at this time, the base B1 of the first transistor Q1 does not generate current, so that the first transistor Q1 is turned on and not turned on. The collector C1 and the emitter E1 of the first transistor Q1 are turned on. Since the collector C1 of the first transistor Q1 and the base B4 of the fourth transistor Q4 are both connected to the second output terminal 22, the base B4 of the fourth transistor Q4 does not generate current, so that the first transistor Q4 does not generate current. The four triode Q4 is in an on state without conducting the collector C4 and the emitter E4 of the fourth triode Q4. Accordingly, the first polarity of the second output terminal 22 is negative.

It can be seen from the above content that when the control element 10 alternately outputs the control signal to the first line 11 and the second line 12 at the set switching frequency, the first polarity and the second output of the first output terminal 21 can be switched alternately the second polarity of the terminal 22 . Because the switching frequency is fast enough, the first output terminal 21 and the second output terminal 22 present a non-polar state under the condition of frequent switching of polarities in a short period of time. Accordingly, when the user electrically connects the lamp to the first output terminal 21 and the second output terminal 22 of the polarity switching circuit 20 , even if the positive and negative poles of the lamp do not match the first output terminal 21 and the second output terminal 22 of the polarity switching circuit 20 The polarity of the two output terminals 22 can also maintain the safety in use and will not affect the lighting effect of the lamp.

Please refer to FIG. 5 for a schematic diagram of the lamp assembly of the present creation. As shown in FIG. 5 , the lamp assembly 100 of the present invention includes a lamp 110 and a control device 120 , and the control device 120 is electrically connected to the lamp 110 . In an embodiment of the present invention, the light fixture 110 is a single or a plurality of light bulbs, light tubes, light bars or light boxes. For example, when the lighting fixture 110 is composed of a plurality of light bulbs (eg, LED light bulbs), the lighting fixture 110 can form a decorative light string, a lighting light string, or a light string for other purposes, but the present invention is not limited thereto.

The control device 120 includes the polarity switching unit 1 and the electrical connection portion 121 as described above. The electrical connection part 121 is electrically connected to the polarity switching unit 1 , and the electrical connection part 121 integrates the first output terminal 11 and the second output terminal 12 of the polarity switching unit 1 . In one embodiment of the present invention, the control device 120 may include a casing, the polarity switching unit 1 may be disposed in the casing, and the electrical connection portion 121 may be disposed outside the casing or only partially or completely exposed to the casing. When the lamp 110 emits light, the polarity switching unit 1 alternately switches the first polarity of the first output terminal 11 and the second polarity of the second output terminal 12 at the switching frequency, and at this time, the lamp 110 cannot be detected by the naked eye due to the alternating polarity switching. And flicker.

The control device 120 further includes an operation unit 122 and a power module 123 . The operating portion 122 is disposed on the outer surface of the casing, and the operating portion 122 may include a power switch or/and a function module (eg, a function key). The power switch is used to control whether to supply power to the lamp 110 , and the function module can adjust the lighting mode of the lamp 110 , such as flickering, brightness change, and the like. The power module 123 is disposed in the casing and is used to supply the power required by the control device 120 or/and the lamp 110 . Here, the power module 123 can be a rechargeable battery, a battery holder, or a plug assembly that can be connected to an external power source.

In addition, in terms of design, the electrical connection portion 121 of the lamp assembly 100 of the present invention can include a foolproof structure, and the lamp 110 can be provided with a corresponding foolproof structure at the position corresponding to the electrical connection portion 121 to prevent the lamp 110 from being electrically connected to Improper connection of Section 121. For example, the foolproof structure and the corresponding foolproof structure can be a combination of special joint shapes, or a combination of bumps and grooves. Another layer of protection is provided when the user places the control device 120 and the lamp 110 against each other by the disposition of the foolproof structure and the corresponding foolproof structure, but the present invention is not limited to this.

To sum up, the lamp assembly and its polarity switching unit of the present invention can quickly switch the output polarity for different output terminals connected to the lamp, so as to achieve the effect of non-polarity at the output terminal, so as to improve the safety and convenience of use and assembly Compared with the conventional lamp assembly, the configuration of the circuit can be reduced.

The above embodiments are merely auxiliary descriptions in nature, and are not intended to limit the embodiments of the subject matter of the application or the applications or uses of the embodiments. Furthermore, while at least one illustrative example has been presented in the foregoing description, it should be appreciated that a vast number of variations are possible in the present creation. It should also be appreciated that the embodiments described herein are not intended to limit the scope, usage, or configuration of the claimed subject matter in any way. Rather, the foregoing embodiments will provide those of ordinary skill in the art with a convenient guide for implementing the described embodiment or embodiments. Furthermore, various changes can be made in the function and arrangement of elements without departing from the scope defined by the patented scope, which includes known equivalents and all foreseeable equivalents at the time of filing this patent application.

1: Polarity switching unit 10: Control elements 11: The first line 12: Second line 20: Polarity switching circuit 21: The first output terminal 22: The second output terminal 23: Electronic switching components Q1: The first transistor Q2: The second triode Q3: The third triode Q4: Fourth transistor B1, B2, B3, B4: Base C1, C2, C3, C4: Collector E1, E2, E3, E4: Emitter V: power terminal G: ground terminal R1: first resistor R2: Second resistor R3: the third resistor R4: Fourth resistor R5: Fifth resistor R6: sixth resistor 100: Lighting Components 110: Lamps 120: Control device 121: Electrical connection part 122: Operation Department 123: Power Module

FIG. 1 is a schematic diagram of the polarity switching unit of the creation. FIG. 2 is a schematic diagram of the polarity switching circuit of the polarity switching unit of the present invention. FIG. 3 is a schematic diagram of the polarity switching circuit of the polarity switching unit of the present invention when the control signal is only received through the first line. FIG. 4 is a schematic diagram of the polarity switching circuit of the polarity switching unit of the present invention when the control signal is only received through the second circuit. FIG. 5 is a schematic diagram of the created lamp assembly.

1: Polarity switching unit

10: Control elements

11: The first line

12: Second line

20: Polarity switching circuit

21: The first output terminal

22: The second output terminal

23: Electronic switching components

110: Lamps

Claims (10)

A polarity switching unit is used for electrically connecting a lamp, the polarity switching unit comprises: a control element for outputting a control signal at a switching frequency; and a polarity switching circuit for electrically connecting the control element, the polarity switching The circuit includes a first output terminal and a second output terminal electrically connected to the lamp, wherein the first output terminal corresponds to a first polarity, and the second output terminal corresponds to a second polarity; wherein the polarity switching circuit receives The control signal is used to alternately switch the first polarity of the first output terminal and the second polarity of the second output terminal, and the switching frequency is defined as when the lamp emits light, the lamp cannot be detected by the naked eye due to the alternating switching of polarities The frequency of flickering. The polarity switching unit of claim 1, wherein the control element is electrically connected to the polarity switching circuit by a first line and a second line, and the control signal output by the control element is alternately at the switching frequency output to the first line and the second line. The polarity switching unit of claim 2, wherein the first polarity is different from the second polarity at the same time point. The polarity switching unit according to claim 3, wherein the polarity switching circuit further comprises a plurality of electronic switching elements, and the plurality of electronic switching elements respectively perform open-circuit or closed-circuit switching according to the control signal, so that the first polarity of the first output terminal is and the second polarity of the second output terminal is alternately switched. The polarity switching unit according to claim 4, wherein the plurality of electronic switching elements comprise a first transistor, a second transistor, a third transistor and a fourth transistor, the first three transistors The pole tube is between a ground terminal and the second output terminal, and the second transistor is between the ground terminal and the first output terminal between terminals, the third transistor is between a power terminal, the first output terminal and the second output terminal, and the fourth transistor is between the power terminal, the first output terminal and the between the second output. The polarity switching unit of claim 5, wherein an emitter of the first transistor is connected to the ground terminal, a base of the first transistor is connected to the first circuit, and the first transistor is connected to the ground. A collector is connected to the second output terminal and a collector of the third transistor; an emitter of the second transistor is connected to the ground terminal, and a base of the second transistor is connected to the second transistor circuit, a collector of the second transistor is connected to the first output terminal and a collector of the fourth transistor; an emitter of the third transistor is connected to the power supply terminal, the third transistor A base of the transistor is connected to the first output terminal, the collector of the third transistor is connected to the second output terminal and the collector of the first transistor; an emitter of the fourth transistor The power supply terminal is connected, a base of the fourth transistor is connected to the second output terminal, and the collector of the fourth transistor is connected to the first output terminal and the collector of the second transistor. The polarity switching unit of claim 6, wherein the polarity switching circuit further comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor, the first resistor Two ends of a resistor are respectively connected to the base of the first transistor and the first line, and two ends of the second resistor are respectively connected to the base of the second transistor and the second line. The two ends of the three resistors are respectively connected to the emitter and the base of the third transistor, the two ends of the fourth resistor are respectively connected to the base of the third transistor and the first output, the fifth Two ends of the resistor are respectively connected to the emitter and the base of the fourth transistor, and two ends of the sixth resistor are respectively connected to the base and the second output of the fourth transistor. A lamp assembly, comprising: a lamp; and a control device for electrically connecting the lamp, the control device comprising: A polarity switching unit as described in any one of claims 1 to 7; and an electrical connection part electrically connected to the polarity switching unit, and the electrical connection part integrates the first output end of the polarity switching unit and the A second output terminal; wherein when the lamp emits light, the polarity switching unit alternately switches the first polarity of the first output terminal and the second polarity of the second output terminal at the switching frequency, and at this time, the The naked eye perceives that the lamp is flickering due to the polarity reciprocal switching. The lamp assembly as claimed in claim 8, wherein the electrical connection portion includes a foolproof structure for preventing improper connection between the lamp and the electrical connection portion. The light fixture assembly of claim 8, wherein the light fixture is a single or a plurality of light bulbs, light tubes, light bars or light boxes.

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